second pass welding

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hey guys, i have a 110V lincoln electric weld pak 3200HD mig/flux cored welder.  I was reading the manual and it said it can do up to 5/16" steel but multiple passes will be needed.  Can somebody explain to me how to know when you need to do multiple passes.  Is there an special way to do this or do you simply go back over you original weld a second time?
Reply:May I ask what you are building?Multiple pass welding starts before you run the first bead.  You have to prepare the joint with a suitable bevel for the application.You must use a self-shielded FCAW wire that is rated for multipass welding to even HOPE to meet the manual's highly exaggerated claims.You must clean the first pass of all slag and may even need to grind some out before you can run the next pass.
Reply:It is needed for the thicker materials. Depends on what you are building also. The ends need to be beveled (single or double depending on where and what it is for) then you put the root pass in clean it and follow a pattern of passes so the heat is displaced throughout the peice evenly... cleaning each pass so you dont get inclusions etc. if it mentions multiple pass welding the typically it will show you a pic of what one should look like/ and how to do it.Certified Welding Inspector at your service...Level II Nuclear Welding InspectorLevel II Nuclear Electrical InspectorLevel II Nuclear Civil InspectorLevel II Ultrasonic Thickness Testing TechnicianCertified Smartass,and Wise Acre
Reply:Originally Posted by MAC702May I ask what you are building?Multiple pass welding starts before you run the first bead.  You have to prepare the joint with a suitable bevel for the application.You must use a self-shielded FCAW wire that is rated for multipass welding to even HOPE to meet the manual's highly exaggerated claims.You must clean the first pass of all slag and may even need to grind some out before you can run the next pass.
Reply:Originally Posted by MAC702May I ask what you are building?Multiple pass welding starts before you run the first bead.  You have to prepare the joint with a suitable bevel for the application.You must use a self-shielded FCAW wire that is rated for multipass welding to even HOPE to meet the manual's highly exaggerated claims.You must clean the first pass of all slag and may even need to grind some out before you can run the next pass.
Reply:Originally Posted by worldsgreatestwelderWell not so true on the requirement of beveling. I would suggest you find your way to a book store or library and do some reading on welding. welding starts before you run the first bead not just multi pass but all welding should start this way have a plan don't just pull the trigger and hope it works out. Operators manuals are guides for using the machine not to be substituted for welding education.Learning to weld via the internet forums is ill advised. Good luckJimmy
Reply:Originally Posted by ironkenahhh come on Jimmy, be easy on arcflash. She has umpteen degrees and, "knows what she's talking about." Not bad for 22 years old........
Reply:for standard structural steel welding, the max size for a single pass weld are 1/2" for flat, 3/8" for horiz., 1/2" for vert, and 5/15" for overhead. Although your machine will difficulty with these sizes.
Reply:Originally Posted by qaqcfor standard structural steel welding, the max size for a single pass weld are 1/2" for flat, 3/8" for horiz., 1/2" for vert, and 5/15" for overhead. Although your machine will difficulty with these sizes.
Reply:Originally Posted by worldsgreatestwelderOOPS. Just an uneducated welder with 30+ on the job.
Reply:WOW what a complete @ss worldsgreatestwelder is
Reply:Originally Posted by kc8yhkWOW what a complete @ss worldsgreatestwelder is
Reply:Originally Posted by ere1983hey guys, i have a 110V lincoln electric weld pak 3200HD mig/flux cored welder.  I was reading the manual and it said it can do up to 5/16" steel but multiple passes will be needed.  Can somebody explain to me how to know when you need to do multiple passes.  Is there an special way to do this or do you simply go back over you original weld a second time?
Reply:Lynn,I know whose brain I am going to be trying to pick now. I have a question for you. When I worked at a paper mill we had pipe that had to be stress relieved and they used a machine with thermal blankets to do this. I was wondering if you could tell me how high the temperature had be and how long at temperature before they started dropping. I saw this done many times but never ask about the temperature. It wasn't until I retired from the paper mill that I took a keen interest in  welding.The pipe was on our digesters - 10 and 12 inch pipe carrying white liquor at 340 degree F at a PH of about 14. You can see why they thought it was so important that they get a good weld. I was wondering if you could go over this process with me. I didn't get into the welding too much because I was in Electronics/Instrumentation, although I had some welders that worked for me.They didn't do the welding on these pipes though. There were only a couple on site that we trusted enough to do this job. ThanksHope I am not hijacking the thread here.
Reply:so you dont hijack the thread i'll answer in a private messageCertified Welding Inspector at your service...Level II Nuclear Welding InspectorLevel II Nuclear Electrical InspectorLevel II Nuclear Civil InspectorLevel II Ultrasonic Thickness Testing TechnicianCertified Smartass,and Wise Acre
Reply:Originally Posted by worldsgreatestwelderWhere did you get these numbers?
Reply:Originally Posted by arcflashlynn30 years on the job doesn't mean you're the greatest welder, despite your alias... but at least you can admit that you are UNEDUCATED. Please, buddy you cannot scrutinize people for using the word need... it wasn't the word SHALL, perhaps you should get educated then post. perhaps after 30 years you should retire
Reply:Originally Posted by arcflashlynn30 years on the job doesn't mean you're the greatest welder, despite your alias... but at least you can admit that you are UNEDUCATED. Please, buddy you cannot scrutinize people for using the word need... it wasn't the word SHALL, perhaps you should get educated then post. perhaps after 30 years you should retire
Reply:you are the most immature person ever. I am 22 and have 6 years welding experience HANDS ON EXPERIENCE so don't think you know me. i could give a (s)hit about you frankly. people like you make people not want to comment or talk on here in fear that you will cut them down or tell them they aren't good enough. i AM a welder thank you.Certified Welding Inspector at your service...Level II Nuclear Welding InspectorLevel II Nuclear Electrical InspectorLevel II Nuclear Civil InspectorLevel II Ultrasonic Thickness Testing TechnicianCertified Smartass,and Wise Acre
Reply:Originally Posted by arcflashlynnyou are the most immature person ever. I am 22 and have 6 years welding experience HANDS ON EXPERIENCE so don't think you know me. i could give a (s)hit about you frankly. people like you make people not want to comment or talk on here in fear that you will cut them down or tell them they aren't good enough. i AM a welder thank you.
Reply:Originally Posted by arcflashlynnyou are the most immature person ever. I am 22 and have 6 years welding experience HANDS ON EXPERIENCE so don't think you know me. i could give a (s)hit about you frankly. people like you make people not want to comment or talk on here in fear that you will cut them down or tell them they aren't good enough. i AM a welder thank you.
Reply:WOW!!! this thread went off topic QUICK
Reply:Originally Posted by kc8yhkWOW!!! this thread went off topic QUICK
Reply:WooooHoooo! Internet fight!Since I don't have anywhere near Jimmy's experience and qualifications, or Lynn's education, and am probably about half way between their ages, I deem myself qualified to comment here.Lynn, If you are interested in rubbing people the wrong way and being self righteous, you are doing fine. If you want to earn the respect of forum members and help those less informed than you are, may I suggest a different tack? (That there's a boatin' word I looked up in my dicshunarry)Jimmy, With due respect and deference to your years of experience and knowledge, may I humbly suggest that you go a bit easier on the kid? I agree on calling her out on any mistakes, but a bit more tact might keep the discussion civil and help the original poster more. She reminds me of my little sister, I feel obligated to stick up for her a bitHave a drink on me...
Reply:Originally Posted by daddyWooooHoooo! Internet fight!Since I don't have anywhere near Jimmy's experience and qualifications, or Lynn's education, and am probably about half way between their ages, I deem myself qualified to comment here.Lynn, If you are interested in rubbing people the wrong way and being self righteous, you are doing fine. If you want to earn the respect of forum members and help those less informed than you are, may I suggest a different tack? (That there's a boatin' word I looked up in my dicshunarry)Jimmy, With due respect and deference to your years of experience and knowledge, may I humbly suggest that you go a bit easier on the kid? I agree on calling her out on any mistakes, but a bit more tact might keep the discussion civil and help the original poster more. She reminds me of my little sister, I feel obligated to stick up for her a bitHave a drink on me...Cheers!
Reply:i'm already drunk!haha As I cannot read this forum without feverishly drinking.Certified Welding Inspector at your service...Level II Nuclear Welding InspectorLevel II Nuclear Electrical InspectorLevel II Nuclear Civil InspectorLevel II Ultrasonic Thickness Testing TechnicianCertified Smartass,and Wise Acre